Lenovo ThinkPad T420si Hardware Maintenance Manual - Page 60

Error messages, Beep symptoms, Table 2. Numeric error codes continued, Table 3. Error messages

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Table 2. Numeric error codes (continued) Symptom or error 2102 Detection error on HDD2 (Mini SATA) 2110 Read error on HDD0 (Main HDD) 2111 Read error on HDD1 (Ultrabay HDD) 2112 Read error on HDD2 (Mini SATA) 2200 Machine Type and Serial Number are invalid. 2201 Machine UUID is invalid. FRU or action, in sequence 1. Reseat the Mini SATA device. 2. Mini SATA device. 3. System board. 1. Reseat the hard disk drive. 2. Main hard disk drive. 3. System board. 1. Reseat the hard disk drive. 2. Ultrabay hard disk drive. 3. System board. 1. Reseat the Mini SATA device. 2. Mini SATA device. 3. System board. System board. System board. Error messages Table 3. Error messages Symptom or error Fan error. Thermal sensing error. This system does not support batteries that are not genuine Lenovo-made or authorized. The system will continue to boot, but may not charge unauthorized batteries. ATTENTION: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no warranties for failures or damage arising out of their use. FRU or action, in sequence 1. Fan. 2. Thermal grease. 3. System board. System board. Replace the battery. Beep symptoms Table 4. Beep symptoms Symptom or error FRU or action, in sequence One beep and a blank, unreadable, or flashing LCD. 1. Reseat the LCD connector. 2. LCD assembly. 3. External CRT. 4. System board. One long and two short beeps, and a blank or unreadable LCD. 1. System board. 2. LCD assembly. 3. DIMM. Two short beeps with error codes. POST error. See Numeric error codes. Two short beeps and a blank screen. 1. System board. 2. DIMM. 54 Hardware Maintenance Manual

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Table 2. Numeric error codes (continued)
Symptom or error
FRU or action, in sequence
2102
Detection error on HDD2 (Mini SATA)
1.
Reseat the Mini SATA device.
2. Mini SATA device.
3. System board.
2110
Read error on HDD0 (Main HDD)
1.
Reseat the hard disk drive.
2. Main hard disk drive.
3. System board.
2111
Read error on HDD1 (Ultrabay HDD)
1.
Reseat the hard disk drive.
2. Ultrabay hard disk drive.
3. System board.
2112
Read error on HDD2 (Mini SATA)
1.
Reseat the Mini SATA device.
2. Mini SATA device.
3. System board.
2200
Machine Type and Serial Number are invalid.
System board.
2201
Machine UUID is invalid.
System board.
Error messages
Table 3. Error messages
Symptom or error
FRU or action, in sequence
Fan error.
1.
Fan
.
2. Thermal grease.
3. System board.
Thermal sensing error.
System board
.
This system does not support batteries that are not
genuine Lenovo-made or authorized. The system will
continue to boot, but may not charge unauthorized
batteries. ATTENTION: Lenovo has no responsibility for
the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out
of their use.
Replace the battery.
Beep symptoms
Table 4. Beep symptoms
Symptom or error
FRU or action, in sequence
One beep and a blank, unreadable, or flashing LCD.
1.
Reseat the LCD connector
.
2. LCD assembly.
3. External CRT.
4. System board.
One long and two short beeps, and a blank or unreadable
LCD.
1.
System board
.
2. LCD assembly.
3. DIMM.
Two short beeps with error codes.
POST error. See Numeric error codes.
Two short beeps and a blank screen.
1.
System board
.
2. DIMM.
54
Hardware Maintenance Manual